Volume 46, Issue 12 e14493
ORIGINAL ARTICLE

Anti-inflammatory action of ark shell (Scapharca subcrenata) protein hydrolysate in LPS-stimulated RAW264.7 murine macrophages

Chathuri Kaushalya Marasinghe

Chathuri Kaushalya Marasinghe

Department of Food and Life Science, Pukyong National University, Busan, Republic of Korea

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Won-Kyo Jung

Won-Kyo Jung

Major of Biomedical Engineering, Division of Smart Healthcare, Pukyong National University, Busan, Republic of Korea

Center for Marine Integrated Bionics Technology, Pukyong National University, Busan, Republic of Korea

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Jae-Young Je

Corresponding Author

Jae-Young Je

Major of Human Bioconvergence, Division of Smart Healthcare, Pukyong National University, Busan, Republic of Korea

Correspondence

Jae-Young Je, Major of Human Bioconvergence, Division of Smart Healthcare, Pukyong National University, Busan 48513, Republic of Korea.

Email: [email protected]

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First published: 30 October 2022
Citations: 9

Abstract

Potential anti-inflammatory effects of ark shell (Scapharca subcrenata) protein hydrolysates were investigated. Ark shell protein hydrolysates were prepared using Alcalase® and pepsin and were designated ASAH and ASPH, respectively. The nitric oxide (NO) inhibitory activity of ASAH and ASPH was determined in lipopolysaccharides (LPS)-stimulated RAW264.7 murine macrophages, and the results showed that ASAH inhibited better NO inhibitory activity than ASPH. ASAH suppressed inflammatory mediator, a prostaglandin E2, secretion of pro-inflammatory cytokines (TNF-α, IL-1β, and IL-6), and production of reactive oxygen species (ROS) dose dependently. It inhibited the protein expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) and simulated heme oxygenase-1 (HO-1) protein expression. However, the pharmacological approach revealed that pretreatment with zinc protoporphyrin ІX (ZnPP), an inhibitor of HO-1, reversed the anti-inflammatory effect of ASAH. Moreover, ASAH upregulated phosphorylation of mitogen-activated protein kinases (MAPKs) including ERK1/2, JNK1/2, and p38 MAPK. To find out the role of MAPKs phosphorylation, MAPKs inhibitors were used, and the results showed that ASAH-mediated HO-1 protein expression and Nrf2 nuclear translocation were abolished. Taken all together, this study revealed that ASAH has a potential anti-inflammatory activity through regulation of the MAPK-dependent HO-1/Nrf2 pathway.

Practical applications

Food-derived marine bioactive peptides, due to their pivotal role in biological activities, are gaining much attention recently. However, the anti-inflammatory activities of ark shell protein hydrolysates still remain to be investigated. This study investigated that ASAH shows potential anti-inflammatory activities through regulation of the MAPK-dependent HO-1/Nrf2 pathway in RAW264.7 murine macrophages. These findings indicated that ASAH may be used as a dietary supplement, functional food, and medicinal drug for the management of inflammation and inflammation-associated diseases.

CONFLICT OF INTEREST

The authors have no conflicts of interest relevant to this study to disclose.

DATA AVAILABILITY STATEMENT

All data generated or analyzed during this study are included in this published article.

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